Improvement in permutation locks



, 2Sheets--SheetL GEORGEL. DAMON.

` lmprovemenf in Permutaton Locks.l

Patented May 30. 871.

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`GEORGE l.. DAMON.

ImprovementinnPermutation Locks'. n .P-atented May 30,1871.

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PATENT GFFIGE.

GEORGE L. DAMoN, or CAMBRIDGE, MASSACHUSETTS.

IMPROVEMENT,INPERMUTATION LCKS.

specification for-ming part of Letters Patent No. 115,445, dated May 3o,1871.

To all whom itfmcy concern:

Be it known that I, GEORGE L. DAMON, of Cambridge, inthe county ofMiddlesex and State of Massachusetts, have invented new and usefulImprovements in Locks; and that the following is a full and exactdescription of the same, reference being had to the accompanyingdrawing.` 1 y A The present invention relates more particularly to thatclass of locksknown as `combination locksyand itconsists, first, 4ofparts arranged, as will be hereinafter described, be`

tween the spindle carrying the tumblers and the bolt ofthe lock, `toallow both the tu mblers to be operated and the bolts thrown by andthrough one handle or spindle.; second, ofa

spindle for' combination or other locks, or for throwing 'bolts ofsafe-doors, 85e., that is constructed with a flange or rim, incombination with a bushing built within the door, &c., and

. constructed with a shoulder, against which the spindle-shoulder comesto a bearing, and with a female-screw thread, to receive a similarmale-screw nut from the inside of safe-door,

. y dto.; third, of an index-hand or pointer, constructed with anelongated slot, for a purposev to be hereinafter stated.

In the accompanying drawing my improvements in locks 1 are illustrated.ln Plate 1,

` Figure 1 isa View in elevation of the interior of a lock constructedaccording thereto. Fig. 12, a face view, in elevation and detail, of theloose and fixed disks of tumbler-spindle. Fig.

2, a horizontal section in a plane above that of the rotary tumblers.VIn Plate 2, Fig.3 is a face view of the graduated `dial and handle `totumbler-spindle.` Figs. 4, 5, and 6, views in detail of the principalconnecting parts betweenrotary tumblers and the door-bolts. Fig.

7, a view in detail of an index or pointer. Fig. 8, a horizontal sectionthrough thickness of `safe-door, showing mode of securing tumbler-`spindle therein, and also the arrangement of fixed and loose disks ontumbler-spindle. Fig. 9, edge view of loose and xed disks ontumbler-spindle, with the spring-catch forretaining the loose disk atcertain times in vertical section.

ing oni-one enda handle,'D, for convenience in turning it, and agraduated dial or face, E, by and through which and an index-hand, F,the said tumblers are brought to their relative position requiredv tosecure the unlocking of the lock. O, a dog, hung at one end to afulcrum, P, of a bolt, Q, arranged to slide between horizontal paralleldovetail 4guideslt \iixed within the lock-casing. The bolt Q is providedwith a stud or head, S, to which the ordinary connecting-bar fordoor-bolts is faste ed. This. dog O extends over the plane of t e rotarytumblers, and, by its projection or nose T, connection is made with thenotch H of fixed disk V when said disk is in proper position therefor.for a portion of its length, has a groove, W,

receiving a stud or pin, X, of an arm, Y, ar-

ranged behind dog O, and hung on a fixed fulcrum, Z, of the lock-case.The arm Y is provided with a bar, A2, extending at a right angle theretoover and across the series of rotary tumblers. The fence or bar A2 ofarm -Y drops into the notches of the tumblers, when they are brought ina corresponding plane or line therewith. The dog O and arm Y,respectively, drop as if one into the notches of tuniblers B and offixed disk V; but when, through turning the fixed disk V to move thebolt Q, the dog 0, interlocked with said xed disk, moves along upon thearm Y, which remains stationary, the groove W and pin X connectionpermit the same. B2, a circular disk, placed loosely upon thetumbler-spindle (l, against the face of the fixed disk V. The loose diskB2 is secured to the fixed disk V by concentric circular slots G2 inconjunction with headed pins c2. (See Figs. 1, 12, and 9.) This loosedisk B2 is provided with a notch, E2, similar to the fixed disk V 5` andat a certain point of its periphery has a slight indentation, b, toreceive the angular end of a vertical swinging lever-catch, F2, pivotedto the lockcase and arranged in proper position to interlock with saidindentation, and by a weight, G2, or other means, to be so held with ayielding pressure. The diameter of the loose disk B2 should be equal to`that of the fixed disk V, but it may be greater; and in the operation ofadjusting the rotary tumblers to a combination to open the locks theloose disk B2, as shown in Fig. 12, Plate I, bridges over The insideface of dog O,

the notch in fixed disk V, and forms a bearing for the dog to travelover as the fixed disk and tumblers are turned, holding the dog atbay-or, in other Words, from giving the least indication to an outsideperson at any time of the position of the notch to xed disk. But withthe rotary tumblers set, by reversing the movement of the handle untilacertain graduation of the dialface, say X, is brought to the index F,and then reversing the movement of the handle again till the graduation,say y, is brought to the same index F, the notches of the fixed andloose disks will correspond and be in proper position to receive the dogO. The rst reverse movement brings the notch of the loose disk to theproper place, where, by the interlocking of the weighted catch F2, it isretained while the next movement reverse to the first stated is beingmade, which latter movement brings the notch of fixed disk opposite andto correspond with that of the loose disk, as before stated, completing,as is apparent, the'setting of the tumblers and disks so that thethrowing of the bolt, as before stated, can be accomplished.

The spindle C is secured in the door as follows: H2, a bushing,constructed with a flange, l2, by which, as the door is built of itsseveral plates, it is firmly secured within the door between some of itslayers or plates. The bushing, by its band or body J2, extends to theinside faceof door, and upon its internal periphery is made afemale-screw thread, terminating at the inner end with a shoulder, K2.The spindle U has a shoulder, L2, which comes to a seat against theshoulder K2 of bushing H2 5 and within the bushing around the spindle isscrewed an annular screw-nut, M2, coming to abearing against theshoulder of spindle (J, securing the spindle in place. To force thespindle either in or out, obviously it is resisted in the one directionby the screw-nut, and in the other by the shoulder of the bushing andthe plates of safe-door between it and the out side face of the door.The index or pointer F is constructed with one elongated slot, n,through which, with a screw-bolt, o', the pointer is secured in placefor the graduated dial. As the pointer has an elongated slot it isobvious, by loosening the screw, it can be changed from its properposition, thus confusing outside operators on the lock.

C' lafims.

1. The lever O and arm Y, the lever O hung to a fixed point of the boltQ and the arm Y to the case, and the two connected together through pinX and slot W for the lever O to move on the arm Y, and both constructedand arranged to interlock with the tumblers B and fixed disk V ofspindle C, as described, for the purpose specified.

2. The bushing H2, having a female-screw thread, a shoulder, K2, and aflange, 12, in cornbination with annular screw-nut M2 and spindle C, asand for the purpose described.

3. An index or pointer, F, having an elongated slot, n, as and for thepurpose described.

GEO. L. DAMON.

Witnesses:

ALBERT W. BROWN, EDWIN W. BROWN.

